Examine source code of scrollToBottom

{
  "author": "benjdewantara",
  "manifest_version": 2,
  "name": "scrollToBottom",
  "version": "1.0.2",
  "description": "The simplest one-click solution to make a page keep scrolling to the bottom",
  "applications": {
    "gecko": {
      "id": "{fe802bae-db9f-11e8-8af9-e8de279ede17}",
      "strict_min_version": "57.0"
    }
  },
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "<all_urls>",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/scrollToBottom-ON.png",
    "default_title": "scrollToBottom",
    "default_popup": "popup/popup.html"
  }
}